Horton

Re: general purpose array_sort

Aleksander Alekseev <aleksander@timescale.com>

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From: Aleksander Alekseev <aleksander@timescale.com>
To: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Junwang Zhao <zhjwpku@gmail.com>, jian he <jian.universality@gmail.com>, Amit Langote <amitlangote09@gmail.com>, "David G. Johnston" <david.g.johnston@gmail.com>, "andreas@proxel.se" <andreas@proxel.se>, Robert Haas <robertmhaas@gmail.com>
Date: 2024-10-24T14:57:52Z
Lists: pgsql-hackers 
Hi,

> It's hardly "general purpose" if it randomly refuses to
> sort certain types.  I would say it should be able to sort
> anything that ORDER BY will handle --- and that certainly
> includes the cases shown here.

I wonder how useful / convenient the new function will be considering
that we already have CTEs and can do:

SELECT array_agg(x ORDER BY x) FROM unnest(ARRAY[5,1,3,2,4]) AS x;

Perhaps there are use cases I didn't consider?

-- 
Best regards,
Aleksander Alekseev

Commits

  1. Introduce a SQL-callable function array_sort(anyarray).

  2. Fix ARRAY_SUBLINK and ARRAY[] for int2vector and oidvector input.

  3. Re-implement the ereport() macro using __VA_ARGS__.